Easy spacing fixes, trailing stuff

Remove useless trailing \
Remove trailing spaces
Add missing empty lines

autopep8 -ir -j2 --select=E301,E302,E502,W291,W293,W391 .

Diff quickly checked.

weboob/tools/capabilities/messages/genericArticle.py

@@ -50,6 +50,8 @@ def drop_comments(base_element):
 
 # Replace relative url in link and image with a complete url
 # Arguments: the html element to clean, and the domain name (with http:// prefix)
+
+
 def clean_relativ_urls(base_element, domain):
     for a in base_element.findall('.//a'):
         if "href" in a.attrib: